Road grading machine



Sept. 6, 1938.

M. F. ALLEN 2,128,889

ROAD GRADING MACHINE Filed March 27, 1936 2 Sheets-Sheet 1 FIG.

66 a7 42 4 a a4 7 FIG. 2

WVENTOA M Sept. 6, 1938. M. F. ALLEN 2,128,889

ROAD GRADING MACHINE Filed March 27, 1936 2 Sheets-Sheet 2 FIG. 3

I I 5 l3 l6 r II I! ll l lwmmmi m Patented Sept. 6,.1938

UNITED STATES PATENT OFFICE ROAD GRADING MACHINE Morris F. Allen, Shreveport, La. Application March 27, 1936, Serial No. 71,196

3Claims. (01.84-44) three hydraulic jack mechanisms at points A, B and 'C as described in the last paragraph and illustrated in Fig.4.

To the slidable plates 9 of the hydraulic jack mechanisms at points A, B and C, I have bolted thereto, rectangular plates 20, using bolts 2|, washers 22 and nuts 23, thru holes l8 and holes To plate 20 at B and to plate 20 at A, I have welded an angle bar 24 having one of its edges vertical and the other horizontal. To plate 20 at C and to plate 20 at A, I have welded another angle bar 25 having one of its edges vertical and the other horizontal. In the vertical edges of angle bars 24 and 25, I have provided holes 26 by means of which I have attached blades 21-21 with bolts 28 and nuts 29. V

I have fixed to angle bars 24 and 25 two brace bars 30 and 3| which are paralleled to slide runners l and 2. To brace bars 30 and 3| I have flexibly attached the ends of a pair of radius rods 32-32 and the opposite ends of radius rods 32-32 are attached to a fixture 33 by a bolt 34 in a way that bolt 34 serves as an axle to allow the opposite ends of the radius rods 32 to be moved up or down as desirable.

Fixture 33 is attached to frame bars 35 and 36 which comprises the frame ofv a four wheeled vehicle composed of wheels 31, rear axle 38 and front axle 39.

It is desired that the frame of my vehicle be higher than the wheels, therefore, I have provided upright supports 40-40 which are attached to the rear axle 38 and extend upward and attached to the frame bars 35 and 36. At a point near where supports 40-40 are attached to axle 39 I have attached braces 4l-4l extending transversally and are attached to frame bars 35 and On the top of front ends of frame bars 35 and 35, I have welded plate 42 and under same frame bars 35 and 36, I have welded a plate 43 somewhat larger than plate 42 but both having a hole as designated by numeral 44.

On the front axle 39, I have welded two upright supporting members 45-45, that extend upward and inclining sufliciently to bring their ends approximately twelve inches apart. Upon the upper ends of supports 45-45, I have welded thereon plate 45 having a hole 41 corresponding with hole 44 in plates 42 and plates 43. hole 44 in plates 42 and 43 and hole 41 in plate 46, I have inserted pin 48. To the supporting members 45-45, I have attached the towing members 49 having braces 50-50 welded to members 49-49 and front axle 38 to insure a rigid Towing bar 49 has an eye af- 6 My invention relates to machines adapted for building and maintaining highways.

The primary object of my invention is the development of a machine that will when in 5 operation grade and spread materials on a road bed at a speed of 12 to 30 miles per hour.

Another object of my invention is to adjust the blades by hydraulic jacks thus a desired elevation of the blades may be remotely controlled.

Still another object is to provide a four wheeled vehicle upon which my invention is suspended and utilized as means of transportation over highways when the machine is carried to and from places of operation at a'speed of 40 miles per hour. This four wheeled vehicle also affords a suitable place for mounting my hydraulic equipment.

With these and other objectsin view, my invention consists of the novel construction and combination of parts as will be'illustrated in the accompanying drawings in which Fig. 1 is an elevation of my invention showing the desired position of the four wheeled :5 vehicle and hydraulic equipment.

Fig. 2 is a side view showing in particular the slide runners and hydraulic jack.

Fig. 3 is an elevation of part of the structure supporting the blades at a point where they converge and attach to plate I.

Fig. 4 is a side view of the hydraulic mechanism attached at each end of the blades.

Referring to the drawings, I have shown a pair of paralleled slide runners I and 2, a cross memher 3 is attached on the front end and on the upper side of the slide runners l and 2. 0n the slide runners l and 2 I have upright structures 4-4 supporting members 5. Near structures 4-4 member 5 is bent downward and attached to slide runner i forming a brace 5.

Between slide runner I and member 5, I have two guide posts 1-! rigidly attached to slide runner l and welded to member 5. Guide posts 1-! are adaptable to be received thru the rings 8 on plate 9. To the rings 8, I have projections I0 having holes I I thru which one end of a spring I2 is attached and. the opposite end attached to the member 5. Between guide posts 1-1 and contacting the member 5, I have suspended a hydraulic jack l3 braced to 1-! by plate l3, said hydraulic jack l3 having a piston l4 contacting a lug IS on the slidable plate 9. In plate 9 I have a'hole l8 on one side and a hole l'l on the opposite side to receive bolts.

On the slide runners l and 2 I have installed construction.

fording a means to fasten said towing bar 45 to an automobile or tractor.

Referring backto frame bars 35 and 36, I have thereto attached two bars 52 and 53 as shown. Between and near the ends of bars 52 and 53, I have suspended two lever jacks 54 and 55 having lifting arms .55 and 51. To lifting arms 55 and 51, I have boltedly attached bars 58 and 59 and the opposite end of the bars 58 and 59 are boltedly attached to upright structures 4-4.

On bar 52, I have attached a hydraulic jack Gil having a piston 6|, said piston 5| is welded to a plate 62 having two holes therein to receive a cable 63 passing over pulleys 64-54 and attached to lifting arms 56 and 51.

In the rear of hydraulic jack 6D, I have mounted an oil reservoir 65 and beyond said 011 reservoir 65, I have an oil pump 66 having pump lever 61. The pump 66 takes suction thru pipe 68 and discharges thru pipe 69 into distributing manifold I0. I have provided a pressure release at II whereby either one or all of the hydraulic jack mechanisms may be controlled.

It is desirable to use a flexible tubing from connections I6 to manifold I and from connection I2 to manifold I0, due to vibration and on account of slide runners I and 2 being raised during travel to and from points of operation.

Near the rear end of frame bars 35 and 36 and attached thereunder, I have a pair of hangers 'I3'I3 extending downward to a point forming a right angle bend I4 on which rests the side of .a plate I; the opposite side of plate I5 is welded to upright structures 4Il40. Plate I5 forms a. platform for an operator to stand while operating the lever 61 of pump 66.

At the lowest point on bar I3, I have attached a movable arm 6. The opposite end of arm I6 is hingedly attached to angle bar 25 providing a means to hold the rear end of the four wheeled vehicle in a central position between the slide runners I and 2. To prevent wearing of slide runners I and 2, I have provided detachable shoes 11 which are attached to slide runners I and 2 at two or more points I8.

On angle bar 25, near the point C, I have attached an auxiliary blade 8|, being flexibly attached to the bar 25 by the pin 83, and also flexibly attached to the slide runner 2 by the pins 82 and 84 and arm 85, affording means to move undesirable stones to the road shoulders.

In operation my road surfacing machine is designed to be towed by a vehicle by means of tow bar 49.

The slide runners I and 2 are lowered to contact the road surface and by building up a liquid pressure on distributing manifold with pump 66; and opening valve 19 the pressure is transmitted thru pipe I 6 into the hydraulic jack I3 forcing piston I4 downward against lug I5 on plate 9. Since angle bars 24 and 25 are attached to plate 9 and blades 21-21 are attached to angle bars 24 and '25, the blades 21-21 are thus forced downward to contact road bed.

Should it be desired that blades 21-21 be raised, the valves I9 and II are opened allowing the fluid pressure to be released in supply tank 55 and the tension of springs I2I2 will raise the plate 9 supporting the blade carrying bars 24 and 25. The opposite ends of angle bars 24 and 25 at points B and C on slide runner 2 are controlled in a similar manner by hydraulic jacks.

When it is desired to transport my road grading machine from job to job, a liquid pressure is forced thru pipe 'l'Zcontrolled by valve 80, into hydraulic jack 58 forcing piston Slout, which exerts a pulling of cable 63 around pulleys 64 raising lever arms 56 and-51 which are connected to bars 5B and 59. Said bars 58 and 59 are attached to uprights 4-4, which are attached to slide runners i and 2, affording means to raise What I claim is:

1. In an improvement of road grading machines the combination of a grading unit comprising blades flxed to a blade carriage formed of angle bars fixed to plate members, said plate members attachable to hydraulic adjusting devices mounted on slide runner members, a four wheeled vehicle positioned between said slide runner members, radius rods attaching the grading unit to the four'wheeled vehicle; a hydraulic pump mechanism mounted on the four wheeled vehicle, pipes communicating between said pump andsaid hydraulic adjusting devices, affording means to force a liquid into the cylinders of said adjusting devices all substantially as and for the purpose set forth. Y

2. An improvement in road grading machines comprising the combination of a four wheeled vehicle, positioned between a pair of slide runners having detachable shoes, attached under said slide runners, hydraulic adjusting devices mounted on supports fixed on said slide runners, a grading unit comprising a blade carriage composed of angle bars supporting blades with plate members attached on the ends of said angle bars, two parallel brace bars fixed on the angle bars, a pair of radius rods connecting said brace bars to a member attached under the frame on the front end of the vehicle; the plate members of said angle bars being attached at three points to the hydraulic adjusting devices mounted on supports on the slide runners, a hydraulic pump mounted on the frame of the vehicle with pipes communicating between said pump and said hydraulic adjusting devices; the improvement consists of setting and holding the grading unit in a fixed position by hydraulic pressure remotely controlled.

3. In a road grading machine of the character described having a four wheeled vehicle positioned between a. pair of slide runners, a grading unit having a plurality of blades, bars flexibly attaching the grading unit to the four wheeled vehicle, a bar flexibly attaching the four wheeled vehicle to a runner member, hydraulic adjusting devices communicating between the grading unit and the runner members, a hydraulic lifting device, mounted on the four wheeled vehicle with lifting. arms attached to the slide runners; a hydraulic pump mounted on the four wheeled vehicle, pipes extending from said pump to the hydraulic lifting and adjusting devices, means to control the fluid flow in said pipes independently, affording an accurate remote control of the blade adjustment and means to raise the slide runners and grading unit from the road bed.

MORRIS F. ALLEN. 

